Unanswered: Reload Ext.form.field.Time drop down values with new format

Unanswered: Reload Ext.form.field.Time drop down values with new format

I'm trying to figure out how to reload the drop down values (which would show a different time format) of the Ext.form.field.Time component. Is there a component function that needs to be called right after setting a new value for the component's format property?